Seiko Cal. 5631 - 677

The 5631-677 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-6e1103bc1a25]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1989

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